Towing-derrick



A. GLoovR. TowlNG D'ERR'ICK.

APPLICATION FILED JAN. 20, I9-2I.

Patented Deu. 20, 1921.

3 SHEETSSHEET l.

A. GLOOR.

owms ommen.

l APPLICATION FILED JANIZO, 1921. .Y 14,400,540, Patented Deo. 20, 1921.

` 3 SHEETS-SHEET 3- I ll lllllllll 1r 4I I will"nmnunnmnmw ALBERTGrLUOR. 0F CHCJGO, ELLEN PATENT OFFICE.

ASSEGNR T0 'SASGEN DERRICK C0., 0F

CHCAGO, ELLNES, CGBPDRTION 0F ELLNOIS.

Specification of Letters Patent.

Patented Dec. 20, 1921.

Application led January 20, 1921. Serial No. 438,731.

To all whom t may concern.'

Be it known that l, ALBERT @Loonj a citizen of the United States. and aresident of Chicago, in the county of Cock and State of Illinois7 haveinvented certain new and useful improvements in a Towing-Derrick, of

. which the following is a specication.

My .invention relates to improvements in derricks and has specialreference to improvements in derriclrs particularly adapted for use upontrucks or automobiles for use in towing cars, or pulling cars out ofditches, etc.

A particular' object of my invention is to provide a simple derrick forthe use mentioned which shall have a boom which can swing freely arounda complete circle; and which boom can be lowered to be alined with thepull when the device is used to pull cars out of ditches or to pull outthe car upon which the device is fined.

A special feature of my improved derricl is its adaptation to use withan automobile repair truck having side tool boxes on its platform, theboom being pivoted at a point above the tops of the boxes so that it canreadily be alined even over the boxese with the line of strain.

A further feature of my invention relates to simple means for lockingthe swinging boom to the standard when the device is used for towing acar. Another feature relates to means for quickly clamping the swingingboom to the standard for preventing the boom swinging around under theordinary strains of use, or to hold it in position over the car uponwhich it is mounted when the car is traveling from place to place.

l obtain the complete circle swing of the boom by means of the manner inwhich l mount the winches or cable drums on the boom itself, thuseliminating any interference with the cables in swinging the boom aroundand providing a very simple and easily operated device.

My invention will be more readily understood by reference to theaccompanyingl drawings forming part of this specification, and in whichFigure l is a side elevation of an automobile truck equipped with aderrick for hoisting and towing automobiles and embodying my invention;

2 is va similar view of the derrick;

Fig. 3 is a top plan view of the standard of the derrick;

F ig. el is a fragmentary horizontal section on the line dk4 of Fig. r2;

Fig. 5 is a vertical fragmentary section on the line 5 5 of Fig. 4;

Fig. G is a horizontal fragmentary section of the standard on the line6-6 of Figs. 2; and

Fig. 7 is a fragmentary top plan view of the rear portion of the truckbody.

F or an automobile repair truck it is necessary to provide not only ameans for towing a disabled car but also means for pulling the car on tothe roadway orI turning it over, if necessary, or for pulling the truckitself out of disadvantageous situations such as a ditch alongside of aroad.

My invention is embodied in an automobile truck, l having a bed or floor2, at the rear of the cab or drivers position. At the sides of the bedare arranged tool boxes 3 rising above the floor 2 and in which thenecessary jacks and other tools may be conveniently carried.

@n the bed 2 between the tool boxes 3 is arranged a derrick.

l preferably arranged the derrick at the rear end of the bed, asillustrated in Fig. lg so that, as shown in dotted lines; the hoistingboom and hook can be swung out to the rear of a truclr for towingpurposes.

My improved derrick comprises a rigid base lmade up of two cross pieces5 and G and a central longitudinal piece 7, the cross` pieces are longenough so that the ends can be suitably bolted to the side members ofthe chassis through the bed of the body. rllhe rear cross piece 5 isarranged adjacent to the rear end of the bed 2 and the forward crosspiece 6 is spaced forwardly there from suiiicient to give adequatesupport to the post or standard 8 of the derriolr, the forward crosspiece providing anchoring connections for suitable inclined braces.

it a point on the standard above the top of the tool boxes 3 I arrange acollar 9.. rlhis collar is rotatable around the standard, it rests upona iiXed collar l0 bolted to the standard and to which the upper ends ofside braces ll are secured by removable bolts 12 and the upper ends offorward and outwardly inclined braces 13 are fixed by a removable bolt14.

The lower ends of the cross braces are secured to the outer ends of thecross piece 5 in bracket-s 15 by removable bolts 16 and Y with four lugs23 inside ofthe several projections 2l and all of these projections areperforated and the standard is secured to the base plate 2O by twotransverse bolts 24 which pass through the several perforations at theJforward and rear sides of the standard and are suitably removably heldin place as by nuts 25.

By removing one or the other of the bolts 25 and disconnecting theseveral braces from the standard the standart can be swung` down on theother bolt 24 as upon a hinge to a horizontal position as indicated indotted lines in Fig. 2.

When swung down forwardly the 4standard will lie on the bed of thetruclr between the tool boxes and the truclr can then be used for otherpurposes, or if desired, the other bolt 25 may also be removed and thederrick entirely removed from .the truck.

Upon the collar 9 lpivotally mount the lower end of a boom 26 to swingup and down on the pivot bolt 27. As best shown in lFig. 5, the collar 9is secured on Van vupper cylindrical extension of the fixed collar i0,which is provided at its upper end with an external flange 28 forming acircumferential groove 29 in which the collar 9 may be rotated aroundthe standard..

This collar 9 is split at one side as shown at 30 and l provide aclamping lever 31 for closingthe collar tightly into the groove 29 uponthe fixed collar 10 to prevent the free rotation of the collar and theboom. The boom is held. at any suitable inclination by means of arotatable cap or collar 32 which is mounted on a fixed cap membersecured on the top of the standard, which is tubular.

The collar 32 is held in place by a nut 34 screwed upon a centralthreaded stem 35 which is rigid with the standard. Upon the collar ispivotally mounted a yoke 36 comprising` side bars 87 between the Vfreeends of which are rotatably secured a pair of sheaves 38. At the outerend of boom of' channel beams arranged back to back and j spaced apart,is mounted a connecting end member 39. in the upper part of this endmember a sheave pulley 40 lis rotatably mounted. 1n the lower part ofthis end member' is mounted a hoisting sheave 41 and between the outerends of the channel earns and adjacent to the end connections, l providea pair of sheaves 42 rotatably mounted on a transverse bearing member43.

At the base of the boom 1 arranged two independent Winches, 44 and 45having suitable gearing and drums.

The winch 44 is adapted to control a cable 46 which leadsV over one ofthe guide sheaves 42 and down to a hoisting device 47 suspended from theouter end of the boom. in the form shown this hoisting device rconsistsof a hoolr 48 dependent from a sheave frame 49 in which a cable sheave50 is rotatably mounted' and the cable 46 is trained around the sheave50, then around the sheave 4l at the end of the boom, the end of thecable being secured to the sheave frame 49. 'Y

The winch 45 carries a cable 51 which is trained around the other of'the guide sheaves 42 at the end of the boom and is then led around oneof the sheaves 38 at the top of the standard, then back around the guidesheave 40 at the outer end of the boom, then back to the top of thestandard around the other guide sheave 88, the end of the cablebeingfinally talren tothe end of the boom and secured to the connection39.

By means of' the winch 45 and cable 5l l enabled to set the boom at anydesired inclination or elevation and by means of' a suitable dog 52which engages in the teeth of one of the gears of the winch 45 l amenabled to hold the boom as set.

By means of the winch 44 and cable 46 l am enabled to put a pullingstrain upon the hook 48 as maybe desired, and by means of a suitable dog53 which engages in the teeth of one of the gears of the winch 44 1 amenabled to retain the hook 48 at any set position. Y

The collars 9 andV 32 by which the boom is secured to the standard areboth rotatable on the standard and consequently the boom can be swungaround bodily with its winches to any desired position and unhindered bybraces, guy ropes or any other device. The I boom and the hook,especially in pulling the truck itself or another car out of a ditch orfor similar work in relation to wrecks, etc.

The clamping device 3l on the collar 9 pr vides a frictional engagementof the collar 9 on the standard to hold the boom against swinging out ofa set position while the truck is run'from place to place, but when itis desired to swing the boom around to the rear as shown in dotted linesin Fig. i to lift or hold elevated the forward or rear part of a car fortowing it, or even just for towing purposes, it is desired to have somemore positive means for holding the boom against the side pull of thetow both from swinging and from turning corners. For this purpose lprovide cooperating projections 54 and 55 on the collar 9 and on thefixed collar 10 respectively, and having vertical openings adapted toregister with each other when the boom is swung around to the rear andwhich openings are adapted to receive a locking pin when they are inregistry. This pin absolutely locks the boom against swinging around onthe standard.

When it is desired to lay the standard down as shown in dotted lines inF ig. 2, the boom is first swung around to the rear and is then lockedby a pin being placed in the openings in the projections 54 and 55 andthen it may be swung down to the rea-r as the standard is lowered, or itma'y be positioned up over the drivers seat, as may be desired, or ifdesired, the standard with the boom may be removed as an entirety fromthe truck.

ris vmany modifications of my invention will readily suggest themselvesto one skilled in the art, l do not limit or confine my invention to thespecific structures herein shown and described.

l claim:

l. In a derrick of the kind described, a fixed standard, a collarrotatable thereon between the ends thereof, a boom pivoted at one end tothe collar, a cable connecting the free end of the boom to the top ofthe standard, a winding drum on the boom for said cable for lifting andlowering the boom, a second winding drum on the boom, a cable leadingfrom the second drum to the free end of the boom and adapted to hangfrom the free end of the boom for connection to an object to be actedupon, and means for locking the collar against rotation on the standard.

2. An automobile repair wagon having side tool boxes on its platform incombination with a derriclr fixed upon the platform between the boxes,the derrick comprising a fixed vertical standard, a collar on thestandard above the tops of the boxes, a boom pivoted at one end to thecollar, a cable connecting the free end of the boom to the top of thestandard, a winding drum on the boom for said cable, a second drum onthe boom,

a cable wound on the second drum andlead ing to the free end of theboom, and means carried by the latter' cable dependent from the end ofthe boom for connection'to an object to be acted upon, the boom beingcapable of being swung through 360 degrees and means for locking theboom when at the rear of the standard.

3. ln a derrick of the kind described, non-rotatable standard, a boom, acollar on the standard to which one end of the boom is pivoted forswinging up and down, the collar being heldV against movementlongitudinally of the standard and rotatable thereon, means for clampingthe collar upon the standard to prevent rotation thereof, and means forpositively locking the collar to the standard in one position.

et. In a derrick of the kind described, a non-rotatable standard, aboom, a split eollar on the standard to which one end of the boom ispivoted for swinging up and down, the collar being held against movementlongitudinally of the standard and rotatable thereon, an eccentric leveron the collar for clamping the collar to the standard, and positivelocking means for holding the boom in one position against swingingaround horizontally.

5. In a towing device, a derrick fixed on a car, a fixed verticalstandard, a boom, a collar rotatable on the standard between its nds towhich one end of the boom is pivotally mounted to swing up and down,means carried by the boom for swinging it up and down and retaining itin its adjusted position, a lifting or pulling cable leading from thefree end of the boom, hoisting gear carried by the boom for operatingsaid cable, the boom being adapted to be positioned sub stantially inthe line of strain when an object is being operated upon by said secondmentioned cable.

6. ln a towing device, a derrick fixed on the rear end of an automotivevehicle and comprising a fixed vertical standard, bracing meansconnected to the standard above its lower end, a collar rotatable on thestandard above the connection with said bracing means, a rotatablemember at the top of the standard, a boom pivoted at one end to saidcollar to swing up and down, a winch on the boom and connected by acable to said rotatable member at the top of the standard for swingingthe boom up and down, a second winch on the boom and a cable leadingtherefrom to the outer end of the boom and adapted to be connected to anarticle to be acted upon, the boom being adapted to be rotated aroundthe standard and to be swun up and down to aline the boom with the lineof strain when the device is used for pulling a car out of a ditch,etc., and means for lock.- ing the boom against rotation when the deviceis used for towing purposes.

7. ln device of the kind described, a {ieri-icl; iixed on the rear endof en automotive vehicle and comprising e Xed standard7 a collerrotatable on the standard between its ends a. boom pivoted at one end tothe coller, a roteteble member at the top of the standard, a boomlifting cable con nected to seid rotatable member leading to the ilreeend of the boom and e winch on the boom on which seid cable is adaptedto be wound, the coller end the standard having openings adapted to bealined for receiving e. locking pin to hold the boom against swingingaround when the device is used igor towing e cer.

8. rllhe combination with en automotive vehicle of e derrick, means forremovably mountinglthe derriclr on the bed of the vehicle, comprisingpairs o upstending spaced apart, rperforated lugs secured to the bed ofthe vehicle, the lower end of the post or standard of the derrick havingperforations registering with the perforations in the upsteinding lugs,removable bolts secured in the registering perforations for securing thepost in position, a coller fixed on the post above its lower endprovided with perforated lugs upstanding connection plates on the bed ofthe vehicle, brace members having perioreticns in their ends adapted tobe registered with respective perforations of the collar and saidupstending connection plates and bolts removably secured in seidregistered perorations for removably securing the braces in position.

Signed December', 1920.

ALBERT GLOOR.

at Chicago, Ill., this 7th day of`

